Valve-base for pneumatic tires.



e. W. GREENE. VALVE BASE FOR PNEUMATJFG TIRES. APPLIOATION FILED MAY 21, 1910.

Patented June 20, 1911.

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GEORGE V7. GREENE, 0F WATERTOWN, MASSACHUSETTS, ASSIGNOR TO SHAVVMUTTIBE COMPANY, OF BOSTGN, MASSACHUSETTS.

VALVE-BASE FOR PNE UMATIC TIRES.

Specification of Letters Patent. Patented June 24), i -w nppiieetionfiled May 21, 1910. Serial No. 562 734.

To all whom it may concern.

Be it known that I, GEORGE GREENE, citizen of the United States, residing at .Vatertown, Massachusetts, have invented certain new and useful Improvements in Valve-Bases for Pneumatic Tires, of which the following is a specification.

My present invention relates to improvements in inner tubes for double tube pneumatic tires and comprises the novel features of crmetruction hereinafter described and particularly set forth in the appended claim.

A portion of an inner tube constructed in aci'zordance with my invention is shown in the accompanying drawing in which,

Figure l is a. plan View, and Fig. '2 is a section on line 22 of Fig. 1.. I

Referring by reference characters to this drawing the numeral 3 designates the ordinary rubber inner tube and 4 the valve stem, these being of the ordinary construction except as hereinafter specified.

In tubes as heretofore constructed it has been found necessary to reinforce the tube in proximity to the valve stem as the pure rubber of which the tube is made is not of Suthcientstrength to Withstand-- the strain of the metallic valve stem which is concentrated upon a small area. Such reinforcements have been placed upon the Outside of the tube but have'been found to be open to serious objection in that in case or a break or rupture either through the reinforcement or close to he edge thereof, it is very ditficult to apply a repair patch which Will-be at all permanent.

According to my invention Iapplytheg reinforcement 5, which is composed of rub-v ber reinforced by fabric indicated at 6, to

the inside of the tube, the outline of the renforcenient being indicated by dot-ted lines in Fig. 1. This leaves a perfectly smooth and uhobstrueted outer surface around the -valve stem which is capable of being;

patched or repaired in the same manner with the same facility and durability as to results as is any other part of the tube. Another feature of advantage of such a construction is that when the valve is put into the base, and the tube is ready to insert, the valve base is in. a concave position. This has the tendency of holding the tube away from the rim While the shoe is being put in place, and the rim is put on, this keeping the tube from being pinched with the iron or the toe of the shoe as is so often i in presence of two Witnesses.

GEORGE W. GREENE.

\Vitnesses:

-A. C. POLLARD, James J. SMITH. 

